DTC 31

DTC 31 - Automatic Transmission FI Signal B

DTC 30: Automatic Transaxle FI Signal A (Part 1 Of 2):

DTC 30: Automatic Transaxle FI Signal A (Part 2 Of 2):

The Check Engine warning light and ECU LED may come on, indicating a system problem, when, in fact, there is a poor or intermittent electrical connection. First, check the electrical connections, clean or repair connections if necessary.